Journal
NEUROSCIENCE LETTERS
Volume 487, Issue 3, Pages 313-317Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2010.10.046
Keywords
Nogo-P3; Normal aging; Response inhibition; Go/nogo; Non-target
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Funding
- Canadian Institute of Health Research (CIHR) [MFE-87658]
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This study tested whether older adults show enhanced suppression of inappropriate processing of non-target information, as marked with the nogo-P3 event-related potential (ERP). Healthy younger and older adults were tested on a simple go/nogo task with visually presented numbers. Unlike in most of the previous studies, go and nogo stimuli were matched for frequency and conflict level in order to minimize the impact of task difficulty, probability monitoring, or conflict detection and resolution on the age-related ERP differences. Older adults showed slower go responses but a comparable accuracy to younger controls. The parietal go-P3 latency was also delayed with aging, while the central nogo-P3 was more pronounced in older adults than in younger controls. The amplitude of this component negatively correlated with go-RTs. In line with previous studies, this suggests that a partial response preparation to nogo events is strongly suppressed in older adults, especially faster ones. (C) 2010 Elsevier Ireland Ltd. All rights reserved.
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